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[Qemu-devel] [PATCH v7 12/14] qapi: Test failure in middle of array pars
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH v7 12/14] qapi: Test failure in middle of array parse |
Date: |
Fri, 16 Oct 2015 22:35:47 -0600 |
Our generated list visitors have the same problem as has been
mentioned elsewhere (see commit 2f52e20): they allocate data
even on failure. An upcoming patch will correct things to
provide saner guarantees, but first we need to expose the
behavior in the testsuite to ensure we aren't introducing any
memory usage bugs.
Signed-off-by: Eric Blake <address@hidden>
---
v7: no change
v6: rebase onto earlier gen_err_check() and testsuite improvements
---
scripts/qapi-visit.py | 4 ++++
tests/test-qmp-input-visitor.c | 10 ++++++++++
2 files changed, 14 insertions(+)
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index ed694a4..100eed9 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -131,6 +131,10 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj,
const char *name, Error
def gen_visit_list(name, element_type):
+ # FIXME: if *obj is NULL on entry, and the first visit_next_list()
+ # assigns to *obj, while a later one fails, we should clean up *obj
+ # rather than leaving it non-NULL. As currently written, the caller must
+ # call qapi_free_FOOList() to avoid a memory leak of the partial FOOList.
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name,
Error **errp)
diff --git a/tests/test-qmp-input-visitor.c b/tests/test-qmp-input-visitor.c
index 9bffd81..f036b65 100644
--- a/tests/test-qmp-input-visitor.c
+++ b/tests/test-qmp-input-visitor.c
@@ -693,6 +693,7 @@ static void test_visitor_in_errors(TestInputVisitorData
*data,
{
TestStruct *p = NULL;
Visitor *v;
+ strList *q = NULL;
v = visitor_input_test_init(data, "{ 'integer': false, 'boolean': 'foo',
'string': -42 }");
@@ -704,6 +705,15 @@ static void test_visitor_in_errors(TestInputVisitorData
*data,
g_free(p->string);
g_free(p);
+
+ v = visitor_input_test_init(data, "[ '1', '2', false, '3' ]");
+ /* FIXME - a failed parse should not leave a partially-allocated
+ * array for us to clean up; this could cause callers to leak
+ * memory. */
+ visit_type_strList(v, &q, NULL, &data->err);
+ assert(q);
+ assert(data->err);
+ qapi_free_strList(q);
}
int main(int argc, char **argv)
--
2.4.3
- [Qemu-devel] [PATCH v7 01/14] qapi: Use generated TestStruct machinery in tests, (continued)
- [Qemu-devel] [PATCH v7 01/14] qapi: Use generated TestStruct machinery in tests, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 03/14] qapi: Provide nicer array names in introspection, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 06/14] qapi: Update tests related to QMP/branch collisions, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 08/14] qapi: Fix alternates that accept 'number' but not 'int', Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 09/14] qapi: Remove dead visitor code, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 14/14] qapi: Simplify visits of optional fields, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 05/14] qapi: Rework collision assertions, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 12/14] qapi: Test failure in middle of array parse,
Eric Blake <=
- [Qemu-devel] [PATCH v7 10/14] qapi: Plug leaks in test-qmp-*, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 13/14] qapi: More tests of input arrays, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 02/14] qapi: Strengthen test of TestStructList, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 07/14] qapi: Simplify visiting of alternate types, Eric Blake, 2015/10/17
- [Qemu-devel] [PATCH v7 11/14] qapi: Simplify error testing in test-qmp-*, Eric Blake, 2015/10/17